无穷等比数列log(8)x,log(8^2)x,log(8^3)x……各项之和为1/2,则x=,

无穷等比数列log(8)x,log(8^2)x,log(8^3)x……各项之和为1/2,则x=, log(1/8)X 等比数列a+log(2)3,a+log(4)3,a+log(8)3求公比q. log（x+5）=log（x）+log（2） log（8）+log（x）=log（24） 2log（x）=log(2x)+log(3) 若无穷等比数列{log以a为底 8/3^n}存在最大值,求a取值范围 简化2log (x + 4) – log(2x + 8) + log(x - 2)谢谢~ 等比数列a+log(2)3,a+log(4)3,a+log(8)3,...的公比为多少? 对数计算1.{log(4)（3）+ log(8) (3)} X {log(3)(2)+log(9)(2)}2.{log(2)(3)} X {log(3)(4)+log(9)(2)}3.(lg2)^+1g2X 1g5 +1g50 (log(2)125+log(2)25+log(8)5)*(log(125)2+log(25)4+log(5)8) 4^[log(2)3+log(4)8] 试解关于x的不等式log(2)x+4log(3)x+12log(8)x+n·2^(n-1)·log(2^n)x a,b,x 都是正数,4[log(a)x]²+[3log(b)x]²=8log(a)x*log(b)x,则a,b的关系 log数学题,求救!高中水平就可以!log(x+8)-log2=log(3x+2)求x. log 8 16=x 怎么解 [log(4)(2x)][log(2x)(3y)][log(3y)(z)]=log(8x)[(8x)]^2,则z=? (log(4)3+log(8)3)(log(3)2+log(9)8) 怎么个思路 log(3)4*log(4)8*log(8)M =log(2)16 M是多少呃.... [log(5)8]*[log(32)5]+log(9)8/log(3)2